Machine Check Architecture (MCA)
The MCA feature was first implemented in the Pentium® processor and is present in all IA32 processor subsequent to the Pentium®. However, the MCA register set was greatly expanded starting with the Pentium® Pro processor. The Pentium®'s MCA consists of the following elements:
The Machine Check exception. If enabled to do so, this exception is generated when the processor detects hardware errors that generally fall within the following categories:
- FSB transaction errors.
- Both correctable and uncorrectable ECC errors detected on internal caches or on the FSB.
- Parity errors detected on the FSB or on internal ROM devices (such as the processor's Microcode ROM).
- Storage errors in the processor's internal caches ...
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